For a plesk server

IMAP

Incomming server
Server: mail.domain.com
Connection security: none
Authentication: Password, transmitted insecurely
User Name: user@domain.com
Port: 143

Outgoing Server:
Server: mail.domain.com
Connection security: STARTTLS
Authentication: Encrypted password
User Name: user@domain.com
Incomming: Port 587

POP

Incomming server
Server: mail.domain.com
Connection security: STARTTLS
Authentication: Encrypted Password
User Name: user@domain.com
Port: 110

Outgoing Server:
Server: mail.domain.com
Connection security: STARTTLS
Authentication: Normal Password
User Name: user@domain.com
Incomming: Port 587